Adjustable halogen lamp



FIG. 1 is a right side elevational view of my design for an adjustable halogen lamp;

FIG. 2 is a left side elevational view of my design for an adjustable halogen lamp;

FIG. 3 is a perspective view as viewed from the right hand side of my design for an adjustable halogen lamp;

FIG. 4 is a perspective view as viewed from the left side of my design for an adjustable halogen lamp;

FIG. 5 is a rear elevational view of my design for an adjustable halogen lamp;

FIG. 6 is a front elevational view of my design for an adjustable halogen lamp;

FIG. 7 is a top plan view where the foot position is turned of my design for an adjustable halogen lamp; and,

FIG. 8 is a bottom plan view of my design for an adjustable halogen lamp with the lamp head facing downardly. 

The ornamental design for an adjustable halogen lamp, as shown and described. 